If urethral catheterization is your fetish, then let the Metal Penis Beaded Sounding Plug 8 mm which comes in silver color offer you the ultimate pleasure! The urethra is lined with hypersensitive nerve endings, which can be extremely pleasurable when stimulated and whats more, deep urethral play is the only way to directly massage the prostate. The urethral sound is made of stainless surgical steel which is completely friendly to the human body and is extremely safe. The three balls on its main body are specially designed for maximum stimulation. Its length reaches 5.8 cm while its nominal diameter is 8 mm. It is fully waterproof so you can even use it inside your bathroom. Always use with a generous dose of lube of your choice and insert slowly and gradually for maximum pleasure.